Test method for measuring shear strength of welding spots and dedicated tester thereof

A technology of shear strength and test method, which is applied in the direction of using a stable shear force to test the strength of materials, etc., can solve the problems of inaccurate measurement results, and achieve the effect of accurate results and improved accuracy.

Inactive Publication Date: 2012-08-22
ZHENGZHOU YUTONG BUS CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0004] The invention provides a test method for measuring the shear strength of solder joints, aiming to solve the problem of inaccurate measurement results of the shear strength measurement of solder joints in the prior art, and also proposes a method dedicated to the test method Test device

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  • Test method for measuring shear strength of welding spots and dedicated tester thereof
  • Test method for measuring shear strength of welding spots and dedicated tester thereof
  • Test method for measuring shear strength of welding spots and dedicated tester thereof

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Embodiment Construction

[0029] An embodiment of the test method for measuring the shear strength of the welding spot of the present invention: the test method comprises the following steps, the first step, two stacked sample plates are welded to each other by a welding spot arranged between the two At the same time, input the opposite torque to the two sample sheets, so that the two sheets have a tendency to rotate relative to each other around the overlapping rotation axis, and the welding point is in the rotation axis; in the second step, when the solder joint breaks, record the size of the torsion moment and the torsion angle of the relative rotation of the two sample sheets.

[0030] The shape of the sample sheet can be any shape, the thickness is between 0.5mm and 2.5mm, and the opposite surfaces of the two sample sheets are clean and smooth planes that have not been corroded.

[0031] The welding spot is at the center of the overlapping portion of the two sample plates.

[0032] When the prese...

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Abstract

The invention relates to a test method for measuring the shear strength of welding spots and a dedicated tester thereof. Torsional moments, the rotational directions of which are opposite, are inputted into two sample plates, so that the two sample plates tend to oppositely rotate around mutually superposed rotational axes, the welding spots are located on the rotational axes, consequently, in the process of turning the two sample plates, the welding spots between the two sample plates are in a pure sheared state, the torsional moment applied on the welding spot by the sample plates in the process of applying test load on the welding spot and the pulling force applied on the welding spot by the sample plates in the process of pulling the welding spot apart are prevented from affecting a welding spot shear test, as a result, the obtained test result is more accurate, and the accuracy of the whole welding spot shear strength test is increased.

Description

technical field [0001] The invention relates to the technical field of welding strength tests, in particular to a test method for measuring the shear strength of solder joints, and also to a test device specially used for the test method. Background technique [0002] Spot welding is a kind of resistance welding, which has been widely used in automobile manufacturing, aviation, aerospace and other industrial sectors. The spot welding structure has the advantages of light weight, high static strength, good reliability, stable performance and easy automation. It has been widely used as a structural connection method by modern automobile bodies. The failure of body solder joints is mainly due to the comprehensive force of tension, shear and torque, which leads to cracking of solder joints. Therefore, considering the extreme force that solder joints can withstand has become the focus of current research. [0003] At present, the International Standards Committee and the Interna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24
Inventor 金泉军汤望阎备战
Owner ZHENGZHOU YUTONG BUS CO LTD
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